High fusing performance externally heated fuser roller
View Patent ↗An externally heated fuser roller to achieve good fusing performance, long life and relatively quick warm-up time. The fuser roller is made up of a metal core, an insulation elastic layer, a heat transport layer and optionally a release layer such that the thickness of the heat transport layer is in the range of about 0.25 and about 1 mm, the effusivity value of the heat transport layer be equal to or greater than about 800 W√s(m 2 K), the total thermal capacity of the heat transport layer is less than about 200 J/m K, and the effusivity value of the insulation elastic layer is less than about 400 W√s(m 2 K).
1. A fuser member of an image forming device for fusing toner onto a substrate, comprising:
a core member comprising a rigid outer surface;
a heat insulation layer; and
a heat transport layer;
wherein the heat transport layer has a thickness between about 0.25 and about 1.0 mm and a total thermal capacity between about 63 and about 200 J/m K, and the heat insulation layer has an effusivity value between about 100 and about 400 W√s/(m 2 K).
2. The fuser member of claim 1 , wherein the heat transport layer has an effusivity value between about 800 and about 5000 W√s/(m 2 K).
3. The fuser member of claim 1 , wherein the heat transport layer has an effusivity value between about 1000 and about 5000 W√s/(m 2 K).
4. The fuser member of claim 1 , wherein the total thermal capacity of the heat transport layer is between about 63 and about 96 J/m K.
5. The fuser member of claim 1 , wherein the effusivity of the heat insulation layer is between about 292 and about 358 W√s/(m 2 K).
6. The fuser member of claim 1 , wherein the thickness of the heat transport layer is between about 0.25 mm and about 0.5 mm.
7. The fuser member of claim 1 , wherein the effusivity value of the heat insulation layer is less than an effusivity value of the heat transport layer.
8. An image fixing apparatus for fixing a developed image on a recording medium, the image fixing apparatus including:
a backup device;
a fuser roller which forms a fixing nip portion with the backup device, the fuser roller comprising:
a rigid metal core member;
a heat insulation layer; and
a heat transport layer; and
a heater external to the fuser roller and disposed in proximity therewith;
wherein the heat transport layer has a thickness ranging from about 0.25 to about 1.00 mm and a total thermal capacity ranging from about 63 to about 96 J/m K, and
the heat insulation layer has an effusivity value of about 100 to about 400 W√s/(m 2 K).
9. The image fixing apparatus of claim 8 , wherein the heat transport layer has an effusivity value between about 800 and about 5000 W√s/(m 2 K).
10. The image fixing apparatus of claim 8 , wherein the heat transport layer has an effusivity value between about 1000 and about 5000 W√s/(m 2 K).
11. The image fixing apparatus of claim 8 , wherein the effusivity of the heat insulation layer is between about 292 and about 358 W√s/(m 2 K).
12. The image fixing apparatus of claim 8 , wherein the effusivity value of the heat insulation layer is less than an effusivity value of the heat transport layer.
13. A fuser member, comprising:
a core member comprising a rigid outer surface;
a heat insulation layer; and
a heat transport layer;
wherein the heat transport layer has a thickness of about 0.25 to about 1.0 mm and an effusivity between about 800 to about 5000 W√s/(m 2 K), and
the heat insulation layer has an effusivity value between about 100 and about 400 W√s/(m 2 K).
14. The fuser member of claim 13 , wherein the heat transport layer has a total thermal capacity of about 1 to about 200 J/m K.
15. The fuser member of claim 13 , wherein the heat transport layer has a total thermal capacity of about 1 to about 120 J/mK.
16. The fuser member of claim 13 , wherein the heat transport layer has a total thermal capacity of about 63 to about 96 J/mK.
17. The fuser member of claim 13 , wherein the thickness of the heat transport layer is between about 0.25 mm and about 0.5 mm.
18. The fuser member of claim 13 , wherein the effusivity of the heat transport layer is between about 1000 and about 5000 W√s/(m 2 K).
19. The fuser member of claim 13 , wherein the effusivity of the heat insulation layer is between about 292 and about 358 W√s/(m 2 K).